Oil burner pumping unit



May`5, 1935 F l.. E. FRENCH 2,039,309

OIL BURNER PUMPING UNIT ,I

Filed May 16, 1935 l 0' le' 4 11",? 4 Y #f 5o .LB/ \L 2.

/A/ VEN TUR.

Patented May 5,1936 y x f2039309 UNITED STATES PATENT OFFICE OIL BURNER PUMPING `UNIT Laurence E. French, Sebastopol, Calif'.

Application May 16, 1935, Serial No. 21,816 l 5Clairns. Cl. 103-218)- The present invention relates to oil burners, of an electric motor I 6. The blower housing 8 and more particularly to burners of the oil-presand the air housing 6 are both attached to a sure atomizing. type, commonly known as gunframework 32 that is supported by pedestals 34 type burners. and 36. The oil is delivered to the central tube Oil burners of the above-described character 2, at a pressure of about 100 pounds per square 5 usually comprise a rotary air fan or compressor, inch, by an oil pump I8 that is mounted directly and also a fuel-oil pump mounted on the airon another shaft 20 of the same electric motor compressor housing, the fan and the pump being I6. The shaft 20 is provided with a. universal driven by a common electric motor. Oil pressure joint 2| in a housing 22, that is bolted to the l is generated in the pump by means of gears oil pump i8 and to the electric-motor housing 10 which, because they operate at motor speed, com- 24. The oil pump I8 is thus driven in perfect municate vibrations to the main frame of the alignment with the fan shaft I4, so thatthe fan machine and are communicated to the furnace. shaft I4 and the oil-pump shaft 20 operate, in These vibrations and consequent noise are pareiect, as a single shaft, having oppositely disticularly objectionable in connection with oilposed parts ifi and 20. Anignition transformer 15 burner equipment used in domestic-home-heat- 2 6 is carried below the motor-supporting framel ing apparatus, the requirements of which are 'or base plate 28 of the motor housing 24. The quite exacting, because of the annoyance caused base plate 2S is secured, at one side, by bolts 30, by the rnoise and the vibration to the occupants to the framework 32 that carries the air housing of the house. 6' and the blower housing 8. The other side of 20 An object of the invention is to provide a new the base plate 2B is mounted upon a support 38 and improved oil burner of the above-described upon a third pedestal 40. The electric-motor character, in which the said vibration and noise housing 24 is thus supported by the base plate shall be greatly reduced. In the case of house- 28,v the framework 32 and the support 38; and

25 heating installations, the apparatus of the preslthis motor housing .24 carries with it the blower 25 ent invention is practically noiseless. l2 and the pump I3, hlOugh the medium 0f the With these and other objects in View, as will shafts I4 and 20. 'Ihe pump I8 may, however, appear from the following description, a feature be mounted firmly on the main frame of the of the invention resides in resiliently mounting, burner, either on the blower side or on themotor as by means of a spring or rubber suspension, they side, or it may be bolted to the blower housing, 30 motor shaft that carries the airkian, and also which produces the same vibration effect as when the motor shaft that carries the pump, thus bolted to the main frame. Sometimes, the pump providing for full-floating power. is driven through a exible coupling, but the The invention will now be, described in convibrations are not thereby prevented. nection with the accompanying drawing, in To reduce the noise and vibration produced 35 which Fig. 1 is an elevation of a 'preferred emby the electric motor I6, the blower I2 and the bodiment of the present invention, parts being oil pump I8, therefore, all that is necessary is broken away, and other partsbeing shown in to provide a floating, yielding or resilient susdotted lines, thebetter to illustrate the invenpension between the motor housing 24 and the tion; and Fig. 2 is a vertical section taken upon base plate 28. In its preferred embodiment, this 40 v'the line 2`2 Iof Fig. 1, looking in the direction resilient suspension comprises four bent, angleof the arrows. shaped springs 42, one arm of each of which is The fuel oil, entering .through acentral tube fastened tothe motor housing 24 by screws 44, 2, is discharged into an .air stream at the tip and the other arm of each of which is secured of an oil-spray nozzle 4, mounted directly in an by nuts 46 upon bolts 48, carried upon the base 45 air housing 6. From the nozzle, the oil emerges plate 28, with rubberwashers interposed. The into a fire box (not shown) in the form of a ne, spring suspension may, however, take another combustible, atomized oil spray. A multipleform, and it may be constituted of other yieldblade fan or air blower I2 draws air into a fan ing, resilient connections, such as rubber. As

50 or blower housing 8, through an opening Ill, at the electric-motor housingv 24, the motor I6 50- low pressure-and discharges thev air into the air therein, the blower I2, the oil pump I8 and all housing 6. The air plays no function in atomiz- .the parts connected thereto, including the shafts ing the oil, but is supplied merely for the pur- I4 and 20, thus float, as a unit, upon the springs pose of providing oxygen for combustion. The 42, the noise and vibration are substantially enblower I2 is mounted directly on the shaft I4 tirely eliminated.' Among the parts soconnected 55 to the oil pump I8 are a fuel-oil strainer 52 for filtering the oil before it reaches the pump, and a pressure-relief valve I9 for raising the oil to a desired; predetermined pressure, and maintaining this presure constant, both integrally connected to the housing 22. It is necessary that the complete fuel-oil unit, including the oil strainer 52, the pressure-relief valve I9, and the oil pump disposed between them, be resiliently connected to float as a unit, as above described. If any one of these three elements 52, I9 and I8 of the fuel-oil unit thus directly connected to the motor I6 is brought into rigid contact with any portion of the blower case or the main frame of the burner, the vibrations from the oil pump I8 become transmitted through this rigid contact to the frame, and thence to the furnace, and from the furnace to the rooms above, causing an objectionable noise. When, on the other hand, the entire unit is supported on its resilient base, practically no sound is audible.

Washers like those indicated at 50 and other iiexible couplings have been employed heretofore, but these areineiectual to prevent vibration and noise because the vibrations are generated in the pump gears, and not in the motor coupling. For the same reasons, motors that are rubber or spring mounted are ineiective; they dampen the vibrations generated in the electric motor, but they have no effect on vibrations generated in the pump gears. According to the present invention, both the pump and the blower are directly mounted on the motor, on opposite sides thereof, so that the Whole unit is completely resiliently mounted or oating by reason of the same resilient connections 42, 50 that resiliently separate the motor I6 from its base plate 28. Y v

Modifications will occur to persons skilled in the art, and all such are considered to fall within the spirit and scope of the invention, as dened in the appended claims.

What is claimed is:

1. An oil burner pumping unit comprising a fuel-oil pump for supplying oil to a fire box, an air-blower fan for supplying air to the fire box to support combustion of the oil, a motor upon which the oil pump and the air-blower fan are solely-supported and connected so-as to be driven thereby, means for supporting the motor together with the oil pump and the air-'blower fan, and means providing a yielding connection between the motor and its said supporting means to reduce noise and vibration.

2. An oil-burner pumping unit comprising a supporting frame, a motor housing, means yieldingly connecting the motor housing to the supporting frame, an electric motor in the motor housing and provided with oppositely extending shafts,'an air-blower vfan mounted directly on one of the motor shafts, a rotary fuel-oil pump supported solely by the motor housing and having a shaft connected directly to the other motor shaft, a fuel-oil strainer and a pressure-relief valve rigidly connected with the pump, and a universal-joint connection between thepum shaft and the said other motor shaft.

3. An oil-burner pumping unit comprising `a support, a motor housing, means yieldingly connecting the housing to the support, a motor in shafts, a rotary fuel-oil pump for supplyingoil to a re box and provided with a shaft, a fueloil strainer and a pressure relief valve rigidly connected with the pump, means supporting the oil pump, the strainer and the valve as aunit solely from the housing, an air-blower fan for supplying air to the fire box to support combustion of the oil, means connecting the pump shaft to one of the motor shafts, and means connecting the air-blower fan to the other motor shaft, whereby the housing, the said unit, the motor and the air-blower fan are iioatingly supported as a unit by the support through the yieldingconnecting means to sound-insulate the moving parts of the motor, the pump and the air-blower fan from the support.

4. An oil-burner pumping unit comprising a support, 'a motor housing, means yieldingly connecting the housing to the support, a motor in the housing having two oppositely disposed shafts, a rotary fuel-oil pump for supplying oil to a fire box and provided vn'th a shaft, a fueloil strainer and a pressure-relief valve rigidly connected with the pump, means supporting the oil pump, the strainer and the valve as a unit solely from the housing, an air-blower housing and an air tube mounted independently of the support for the motor, the air-blower housing having an opening through which one of the motor shafts freely extends, an air-blower fan in the air-blower housing for supplying air through 'the air tube to the re box to support combustion of the oil, means connecting the airblower fan to the said one motor shaft, and means connecting the pump shaft to the other motor shaft, whereby the motor housing, the said unit, the motor and the air-blower fan are iloatingly supported by the support as a unit through the yielding-connecting means independently of the air-blower housing and the air tube to sound-insulate the moving parts of the motor, the pump and the air-blower fan from the support, the air-blower housing and the air tube.

5. An oil-burner pumping unit comprising a support, a motor housing having oppositely disposed openings, means yieldingly connecting the housing to the support, a motor in the housing having two oppositely disposed shafts extending freely through the respective openings in the housing, a pump housing connected to the motor housing so as to be supported solely thereby, the pump housing having an opening through which one of the shafts freely extends, an air-blower housing and an air tube mounted independently of tliesupport for the motor, the air-blower housing having an opening through which the other shaft freely extends, a rotary fuel-oil ypump in the pump housing for supplying oil to a re` box, the pump having a shaft connected to the said one motor shaft, a fuel-oil strainer and a pressure-relief Valve rigidly connected with the pump, an air-blower fan in the air-blower housing for supplying air through the air tube to the re box to support combustion of the oil, and means connecting the air-blower fan to the said other motor shaft, whereby the motor housing, the pump housing, the motor, the pump, the strainer, the valve, the air-blower fan and the shafts are oatingly supported by the support as a unit through the yielding-connecting means independently of the air-blower housing and the .air tube to sound-insulate the moving parts of the motor, the pump and the air-blower fan from the support, the air-blower housing and the air tube.

LAURENCE E. FRENCH. 

